Provide three applications of each in light of soil stability. I. Hydraulic conductivity II. Liquid limit III. Plasticity index IV. Moisture content V. Permeability

 

Q#:Provide three applications of each in light of soil stability.

                                            I.            Hydraulic conductivity                                                 

                                         II.            Liquid limit

                                       III.            Plasticity index

                                      IV.            Moisture content

                                         V.            Permeability

ANSWER

 

Hydraulic coductivity

 

Ø More the hydraulic conductivity  of soil,more  will be the movement of water inside soil thus reducing stability of soil

Ø Hydraulic conductivity value is a measure of compactio e.g high hydraulic conductivity value indicate that the soil is not well compacted . so we can infer that as a weak soi 

Ø Increased hydraulic conductivity of water can lead to accumulation of pores pressureinside soil which in turn decrease the effective stress acting on soil thus  create probability of bulking of soil.

 

plastic index

Ø higher plasticity index represent more  plastic behaviour of soil which means more settlement of soil,thus reducing soil stability.

Ø soil with low or zero plasticity index have stiff or non plastic nature which show high bearig capacity  of soil which increse  soil stability

Ø it indicate compressibility of soil e.g the greater the plasticity index higher the soil compressibility .

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Moisture Content

 

Ø Soil which low moisture  content show high bearing capacity of soil thus increasing soil capacity 

Ø moisture contet effect the shear strength of soil (mainly if the soil conain clay particals ) generally shear stregth of soil decrease with increase in water.

Ø Moisture soil contain value effect the penetration resistance value e.g dry soil have high penetration resistance and vice versa.

 

liquid limits

Ø liquid limit values can be used to predict the consolidation properties and state of consistency of fine grained soil on site

Ø liquid limit values are used to measure the allowable bearing capacity

Ø liquid limit values are used to measure the settlement value due to any loading o top of soil

Permeability

Ø permeability values gives an idea about the soil texture which directly related to soil stability

Ø Higher permeability means presence of large voids which results in increased settlment thus reducing stability of soil and It gives an idea about soil structure or packing of molecule which in tur relate to soil stability

Ø high permeable soil are more susceptible to soil slope failure due to increase movement of water inside soil